Merge pull request #36 from tomaka/emscripten

[WIP] Support for emscripten

1 files changed, 82 insertions, 0 deletions

diff --git a/src/api/emscripten/ffi.rs b/src/api/emscripten/ffi.rs
new file mode 100644
index 0000000..34b6c17
--- /dev/null
+++ b/src/api/emscripten/ffi.rs
@@ -0,0 +1,82 @@
+#![allow(dead_code)]
+#![allow(non_snake_case)]
+#![allow(non_camel_case_types)]
+
+use libc;
+
+pub type EM_BOOL = libc::c_int;
+pub type EM_UTF8 = libc::c_char;
+pub type EMSCRIPTEN_WEBGL_CONTEXT_HANDLE = libc::c_int;
+pub type EMSCRIPTEN_RESULT = libc::c_int;
+
+pub type em_webgl_context_callback = extern fn(libc::c_int, *const libc::c_void, *mut libc::c_void)
+    -> EM_BOOL;
+
+#[repr(C)]
+pub struct EmscriptenWebGLContextAttributes {
+    pub alpha: EM_BOOL,
+    pub depth: EM_BOOL,
+    pub stencil: EM_BOOL,
+    pub antialias: EM_BOOL,
+    pub premultipliedAlpha: EM_BOOL,
+    pub preserveDrawingBuffer: EM_BOOL,
+    pub preferLowPowerToHighPerformance: EM_BOOL,
+    pub failIfMajorPerformanceCaveat: EM_BOOL,
+    pub majorVersion: libc::c_int,
+    pub minorVersion: libc::c_int,
+    pub enableExtensionsByDefault: EM_BOOL,
+}
+
+// values for EMSCRIPTEN_RESULT
+pub const EMSCRIPTEN_RESULT_SUCCESS: libc::c_int = 0;
+pub const EMSCRIPTEN_RESULT_DEFERRED: libc::c_int = 1;
+pub const EMSCRIPTEN_RESULT_NOT_SUPPORTED: libc::c_int = -1;
+pub const EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED: libc::c_int = -2;
+pub const EMSCRIPTEN_RESULT_INVALID_TARGET: libc::c_int = -3;
+pub const EMSCRIPTEN_RESULT_UNKNOWN_TARGET: libc::c_int = -4;
+pub const EMSCRIPTEN_RESULT_INVALID_PARAM: libc::c_int = -5;
+pub const EMSCRIPTEN_RESULT_FAILED: libc::c_int = -6;
+pub const EMSCRIPTEN_RESULT_NO_DATA: libc::c_int = -7;
+
+extern {
+    pub fn emscripten_webgl_init_context_attributes(attributes: *mut EmscriptenWebGLContextAttributes);
+    pub fn emscripten_webgl_create_context(target: *const libc::c_char,
+        attributes: *const EmscriptenWebGLContextAttributes) -> EMSCRIPTEN_WEBGL_CONTEXT_HANDLE;
+
+    pub fn emscripten_webgl_make_context_current(context: EMSCRIPTEN_WEBGL_CONTEXT_HANDLE)
+    -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_webgl_get_current_context() -> EMSCRIPTEN_WEBGL_CONTEXT_HANDLE;
+
+    pub fn emscripten_webgl_destroy_context(context: EMSCRIPTEN_WEBGL_CONTEXT_HANDLE)
+        -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_webgl_enable_extension(context: EMSCRIPTEN_WEBGL_CONTEXT_HANDLE,
+        extension: *const libc::c_char) -> EM_BOOL;
+
+    pub fn emscripten_set_webglcontextlost_callback(target: *const libc::c_char,
+        userData: *mut libc::c_void, useCapture: EM_BOOL, callback: em_webgl_context_callback)
+        -> EMSCRIPTEN_RESULT;
+    pub fn emscripten_set_webglcontextrestored_callback(target: *const libc::c_char,
+        userData: *mut libc::c_void, useCapture: EM_BOOL, callback: em_webgl_context_callback)
+        -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_is_webgl_context_lost(target: *const libc::c_char) -> EM_BOOL;
+
+    // note: this function is not documented but is used by the ports of glfw, SDL and EGL
+    pub fn emscripten_GetProcAddress(name: *const libc::c_char) -> *const libc::c_void;
+
+
+    pub fn emscripten_request_fullscreen(target: *const libc::c_char,
+        deferUntilInEventHandler: EM_BOOL) -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_exit_fullscreen() -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_set_element_css_size(target: *const libc::c_char, width: libc::c_double,
+        height: libc::c_double) -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_get_element_css_size(target: *const libc::c_char, width: *mut libc::c_double,
+        height: *mut libc::c_double) -> EMSCRIPTEN_RESULT;
+
+    pub fn emscripten_sleep(delay: libc::c_uint);
+}